"Take 'em one by one," grunted Jim, setting the example by swinging his spear at the body of the nearest guard. "We'll get at that damn thing with the overgrown brains yet!" His spear clanged on iron-hard horn as the termite swung its unwieldy head to protect its unarmored body. The force of the contact tore the spear from his hand; but almost before it could drop, he had recovered it. And in that flashing instant Denny had darted in at the side of the thing and half disembowelled it with a thrust of the acid-blunted point of his three-foot bar, and a lightninglike wrench up and to the side. "Only two left!" cried Jim, stabbing at the flabby head of the syringe-monster that loomed a foot above his own head. "We'll do it yet, Denny!" But at that moment a clashing and rattling at the doorway suddenly burst in on the din of the eery fight. Both men stared at each other with surrender in their eyes. "Now we _are_ all through!" yelled Jim, almost calm in his complete resignation. "But we'll try to reach that devilish thing before we're doomed!" * * * * * In the heat of the swift, deadly fray, the two men had forgotten for the moment, that these few soldiers ranged against them were not all the fighters in the mound city. But the quaking intellect they were striving to reach had not forgotten! At some time early in the one-sided struggle it had sent out a soundless call to arms. And now, in the doorway, struggling to force through in numbers too great for the entrance's narrow limits, were the first of the soldier hordes the ruler had commanded to report here for fight duty. And behind them, as far as the eye could see, the tunnel was blocked by yet others marching to kill the creatures that menaced their leader. The abortive effort at escape, it seemed, was doomed. The strength of desperation augmented Jim's naturally massive muscular power. He whirled his spear high over his head, clubwise. Disdaining now to try for a thrust behind and to one side of the great conical head that faced him, he brought the bar down with sledge-hammer force on the horn-plated thing. As though it had been a willow wand, the big bar whistled through the air in its descent. With a crack that could be heard even above the crashing mandibles of the soldiers pouring across the hundred-yard floor toward the scene of battle, the bar landed on the living buckler of a head. The head could not have been actually harmed. But the brain behind it was patently jarred and numbed for an instant. The great creature stood still, its head weaving slowly back and forth. Jim swung his improvised club in another terrific arc.... * * * * *